This 2014 game was released by a developer who had initially been into making Christian-themed games for kids. But, when video game reviewer Jim Sterling called his character designs "horrifying," the developer instead leaned into it, using his artistic style to make a (intentionally scary) horror game. Once it was released on Steam, and later on mobile devices, it exploded in popularity, and the creator made three sequels over the next year. Name the FIRST GAME in the series.
FIVE NIGHTS AT FREDDY'S